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All iguana families with the exception of basilisks share sex chromosomes

M. Altmanová, M. Rovatsos, M. Johnson Pokorná, M. Veselý, F. Wagner, L. Kratochvíl,

. 2018 ; 126 (-) : 98-102. [pub] 20171122

Jazyk angličtina Země Německo

Typ dokumentu časopisecké články, práce podpořená grantem

Perzistentní odkaz   https://www.medvik.cz/link/bmc18024408

Once believed to be restricted only to endotherms (mammals and birds), several poikilothermic amniote lineages have recently been documented to possess long-term evolutionary stability in their sex chromosomes. However, many important lineages were not included in these tests. Previously, based on molecular evidence, we documented the homology of well-differentiated sex chromosomes among seven families of iguanas (Pleurodonta), with basilisks (Corytophanidae) being the only exception, as the tested genes linked to X, but missing on the Y chromosome, in other iguanas were autosomal or pseudoautosomal in basilisks. In this study, we test the homology of sex chromosomes in the remaining, previously unstudied iguana families (Hoplocercidae, Leiosauridae, Liolaemidae, Polychrotidae) and in the basilisk genus Corytophanes. Our results show that 12 currently recognized families of iguanas share X-specific gene content conserved from the common ancestor living in the Cretaceous period. However, the results in the genus Corytophanes indicate the loss of the ancestral differentiated sex chromosomes from the ancestor of basilisks. Our new data further confirm the extensive stability of sex chromosomes in iguanas, thus enabling molecular sexing based on the comparison of the number of X-specific genes by quantitative PCR (qPCR) in all but one family of this widely diversified clade.

Citace poskytuje Crossref.org

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$a Altmanová, Marie $u Department of Ecology, Faculty of Science, Charles University, CZ-12844 Prague, Czech Republic; Institute of Animal Physiology and Genetics, The Czech Academy of Sciences, CZ-27721 Liběchov, Czech Republic. Electronic address: altmanova.m@gmail.com.
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$a Once believed to be restricted only to endotherms (mammals and birds), several poikilothermic amniote lineages have recently been documented to possess long-term evolutionary stability in their sex chromosomes. However, many important lineages were not included in these tests. Previously, based on molecular evidence, we documented the homology of well-differentiated sex chromosomes among seven families of iguanas (Pleurodonta), with basilisks (Corytophanidae) being the only exception, as the tested genes linked to X, but missing on the Y chromosome, in other iguanas were autosomal or pseudoautosomal in basilisks. In this study, we test the homology of sex chromosomes in the remaining, previously unstudied iguana families (Hoplocercidae, Leiosauridae, Liolaemidae, Polychrotidae) and in the basilisk genus Corytophanes. Our results show that 12 currently recognized families of iguanas share X-specific gene content conserved from the common ancestor living in the Cretaceous period. However, the results in the genus Corytophanes indicate the loss of the ancestral differentiated sex chromosomes from the ancestor of basilisks. Our new data further confirm the extensive stability of sex chromosomes in iguanas, thus enabling molecular sexing based on the comparison of the number of X-specific genes by quantitative PCR (qPCR) in all but one family of this widely diversified clade.
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$a Rovatsos, Michail $u Department of Ecology, Faculty of Science, Charles University, CZ-12844 Prague, Czech Republic. Electronic address: mirovatsos@gmail.com.
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$a Johnson Pokorná, Martina $u Department of Ecology, Faculty of Science, Charles University, CZ-12844 Prague, Czech Republic; Institute of Animal Physiology and Genetics, The Czech Academy of Sciences, CZ-27721 Liběchov, Czech Republic. Electronic address: martina.pokorna@natur.cuni.cz.
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$a Veselý, Milan $u Department of Zoology, Faculty of Science, Palacky University, CZ-77146 Olomouc, Czech Republic. Electronic address: veselym@prfnw.upol.cz.
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$a Wagner, Florian $u Hanauer Landstrasse 509a, D-60386 Frankfurt am Main, Germany. Electronic address: flozoo@web.de.
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$a Kratochvíl, Lukáš $u Department of Ecology, Faculty of Science, Charles University, CZ-12844 Prague, Czech Republic. Electronic address: lukas.kratochvil@natur.cuni.cz.
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